Fix chainable API (#107)

Author: mcollina

boot.js

@@ -30,7 +30,7 @@ function wrap (server, opts, instance) {
 
   server[useKey] = function (fn, opts) {
     instance.use(fn, opts)
-    return instance
+    return this
   }
 
   Object.defineProperty(server, 'then', { get: thenify.bind(instance) })

test/chainable.test.js

@@ -69,3 +69,29 @@ test('chainable automatically binded', (t) => {
     t.end()
   })
 })
+
+test('chainable standalone with server', (t) => {
+  t.plan(6)
+
+  const server = {}
+  boot(server, {
+    expose: {
+      use: 'register'
+    }
+  })
+
+  const readyResult = server.register(function (ctx, opts, done) {
+    t.pass('1st plugin')
+    done()
+  }).after(function (err, done) {
+    t.error(err)
+    t.pass('2nd after')
+    done()
+  }).register(function (ctx, opts, done) {
+    t.pass('3rd plugin')
+    done()
+  }).ready(function () {
+    t.pass('we are ready')
+  })
+  t.equal(readyResult, undefined)
+})